/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Parameterization/PatchBasedMeshUVGenerator.h
Calculate UVs for the input mesh patches of TargetMesh and store in TargetUVOVerlay
number of failed UV islands, 0 if all were successful, and -1 if Progress was cancelled
int32 ComputeUVsFromTriangleSets ( [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) & TargetMesh, [FDynamicMeshUVOverlay](API\Runtime\GeometryCore\DynamicMesh\FDynamicMeshUVOverlay) & TargetUVOverlay, const [TArray](API\Runtime\Core\Containers\TArray)< [TArray](API\Runtime\Core\Containers\TArray)< int32 >> & TriangleSets, [TArray](API\Runtime\Core\Containers\TArray)< bool > & bValidUVsComputedOut, [FProgressCancel](API\Runtime\GeometryCore\Util\FProgressCancel) * Progress )